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(No Model.) 2 SheetsSheet 1. O. W. MORRIS & L. GOODWIN. SMOKE OONSUMING APPARATUS Patented Sept. 18, 1894 Com "nee;

UN ITED ST TES PATENT OFFIOE.

CHARLE w. M RIS AND LEWIS GOODWIN, OF BOSTON, MASSACHUSETTS;

SAID cOoDw N ASSIGNOR T0 SAID, MORRIS. A

SMOKE-CONSUMING APPARATUS.

SPECIFICATION forming-part of Letters Patent No. 526,085, dated September 18, 1894.

Application filed September 11, 1893. Serial No. 4 (N0 IMaeL) To wZZ whom ifimay concern:

Be it known that we, CHARLES W. MORRIS and LEWIS GOODWIN, of Boston, in the county of Suffolk and State of Massachusetts, have Invented certain new and useful'Improvements in Smoke-Consuming Apparatus, of which the following is a specification.-

ThIs invention relates to certain improvements 1n the smoke consuming apparatus shown and described in Patent No. 479.767, granted uly 26, 1892, to Wesley Smith.

The objects of the present invention are to provide means for more thoroughly heat- Ing the induced current of air before it reaches the fire-box, and for more uniformly distributing it throughout the fire-box.

To these ends the invention consists of certain novel features of construction and combination of parts hereinafter described and claimed.

The invention is illustrated in theaccompanying drawings, in which Figure 1 shows a side elevation of a statlonary boiler and fire-box to'which the invention is applied, the furnace wall being' broken away and the bridge wall appearing In sectlon. Fig. 2 shows a section on line 2'2 of Fig. 1. Fig. 3 shows a section on line 33 of Fig. 2, the parts appearing on a larger scale, and a modification being illustrated. Fig. 4 shows a horizontal section similar to that shown in Fig.2, the parts being drawn to the same Scale as in Fig. 3, certain parts which appear in plan in Fig. 2, appearing in section, and the modification appearing in Flg. 3 being shown in this figure. Fig. 5 shows a section on line 55 of Fig. 4. Figs. 6 and 7 show perspective details of the nozzles which deliver the air to the fire-box. Flg. 8 shows a section of the connections between the compressed air-conduit and the secondary air-conduit.

The reference letter a designates the boiler, 12 the fire-box, and o the bridge-wall. A pair of nozzles d and d in the form of elongated rectangular castings rest one upon the other on an offset in the bridge-Wall and have ears d which extend by the ends of the bridgewall. Each of said castings has a longitudi pal bore 01 and an orifice or orifices extendlng angularly from said bore out of the front side of the casting. The orifice of the nozzle cl is an elongated slot' d extending nearly its full length, whereas the nozzle d, has a line of holes or perforationsd. and perforations 61 extend on opposite angles or diverge, whereby the air injected through them will be distributed more completelythrough the fire-box.

Pipes or conduits e lead froma compressed air-reservoir and have branches 6' which connect with the ears d of the nozzles cl (1' and communicate with the interior of said nozzles. A contracted nozzle e is inclosed within each of the pipes e at a certain point. It will be observed that the said pipes pass through the furnace where they are exposed to the heated products of combustion from the fire-box.

A rectangular casingfis supported at its front end on the bridge-wall by means of a central leg f and at its rear end on a pierf', or this casing may be supported in any other suitable manner A space f is left between this casing and the bridge-wall on each side of the supporting leg f, whereby the heated products of combustion not only pass over this casing but also under the same so that the casing is thoroughly heated. Within the said casing is formed a tortuous passage-way f and a pipe or conduit f conducts external air to the middle branch of said passage-way, and this pipe extends through the furnace where it is exposed to the heat. Each end of the passage-way communicates by a short pipe f with one of the compressed air pipes c at such a point with respect to the nozzle e (see Fig. 8) that the compressed air will induce a current of air through the tortuous passage-way.

The general principle and action of the apparatus here shown are substantially the same as that described in the patent 'hereinbefore referred to, and hence will require no elucidation herein. Suffice it to say that the object is to induce a current of air I and inject it, heated, into the firebox, to promote combustion therein.

It will be observed that by conducting the induced current of air through the tortuous passage in the casing f which is subjected on all sides to the heated product of combustion The slot 61 from the fire-box, this induced current will be thoroughly heated before passing to the firebox.

It will be seen that the objects primarily set out are accomplished by the construction and arrangement described.

A modification in the construction is shown n Flgs. 3 and 4 in the form of a passage-way communicating with branches j of the pipes e, and extending around the sides and the front of the fire-box. As here shown this passage is formed in the furnace-walls, and

at the front extends in a rib or bulged out.

portionj of said wall and at the sides communicates with passages 7' in similarly bulged out portions j. Said bulged out portions 1' and project over the grate and are provided with a series of perforationsj through which air enters the fire-box, as indicated by the arrow. By this construction, it will be seen that the air is distributed more thoroughly through the fire-box. Instead of forming the passages in the walls of the furnace, pipes may be laid in.

The parts exposed to the heat of the tirebox, as the nozzles 01 and d and easing f, are made of refractory material, such as fire-clay.

Having thus described our invention, what we claim as new,and desire to secure by Letters Patent, is-

1. The combination with a furnace or firebox, of a casing exposed on all sides to the heated products of combustion and inclosing a tortuous passage-way having a port at the middle and at each end, a conduit connected with the central port and adapted to convey air under pressure into the tortuous passageway, secondary conduits extending along opposite sides of the said casing and opening to the external air, said conduits inclosing contracted nozzles, passages affording communication between the end ports of the tortuous passage-way and the said secondary conduits and entering the latter back of the nozzles therein, anda nozzle extending across the back of the fire-box and communicating with the secondary conduits.

2. The combination with a furnace or firebox, of a casing exposed on all sides to the heated products of combustion and inclosing a tortuous passage-way having a port at the middle and at each end, a conduit connected with the central port and adapted to convey air under pressure into the tortuous passageway, secondary conduits extending along opposite sides of the said casing and opening to the external air, said conduits inclosing contracted nozzles, passages affording communication between the end ports of the tortuous passage-way and the said secondary conduits and entering the latter back of the nozzles therein, and nozzles located one above the other and extending across the fire-box and having divergent outlet-openings and communicating respectively with branches of the secondary conduits.

3. The combination with afurnace or firebox of a casing exposed on all sides to the heated products of combustion and inclosing a tortuous passage-way having a port at the middle and at each end, a conduit connected with the central port and adapted to convey air under pressure into the tortuous passageway, secondary conduits extending along opposite sides of the said casing and opening to the external air, said conduits inclosing contracted nozzles, passages aifording communication between the end ports of the tortuous passage-way and the said secondary conduits and entering the latter back of the nozzles therein, a nozzle extending across the back of the fire-box and communicating with the secondary conduits, and a passage extending around the sides and front of the fire box and communicating therewith through suitable perforations, said passage communicating with the secondary conduits in advance of the nozzles therein.

In testimony whereof We have signed our names to this specification, each in the presence of two subscribing witnesses, this 6th day of September, A. D. 1893.

CHARLES w. MORRIS. LEWIS eoonwm.

Witnesses:

FRED L. LAIRD, J. W. PEcK. 

